Converting 2004 Boxster Power Steering to 12V

[Deadeye]

Do you have a wiring diagram to connect the mr-2 pump?

[Deadeye]

Also, do you have a parts list with part #'s and source for the wire connectors, plugs & relay?

[PorscheFan5]

Originally Posted by Deadeye

Also, do you have a parts list with part #'s and source for the wire connectors, plugs & relay?

Deadeye,

Yes and yes. Will post later today. I got the connectors and wires for the pump from toyotapart.com, relay from eBay. Will post details and the 986 forum link for the diagram article...

[PorscheFan5]

Deadeye,

Here are the details you need:

Items for the MR2 Spyder pump purchased from Factory Toyota Parts and Toyota Accessories We are an OEM Parts Supplier.:


Code Item Qty Price/Ea. Total
90980-12068 HOUSING, CONNECTOR, FEMALE 1 $8.75 $8.75
90980-10897 HOUSING, CONNECTOR, FEMALE 1 $8.02 $8.02
90980-10942 HOUSING, CONNECTOR, FEMALE 1 $5.24 $5.24
82998-12440 TERMINAL, REPAIR W/ WIRE 3 $5.35 $16.05
82998-12500 TERMINAL, REPAIR W/ WIRE 2 $5.35 $10.70
Shipping: Small Flat Rate: $6.50
Sales Tax: $0.00
Total: $55.26
Toyotapart.com 5850 Stadium Dr Kalamazoo, Mi. 49009

80 Amp Relay from eBay - URL
Will use a new type resettable fuse - URL

Connection Diagram attached. The fuse goes between battery 12V (not key-switched 12V) and relay contact - left top corner of diagram.

Hope that helps. Let me know if you need anything else...

[Deadeye]

Perfect. Thanks!

[PorscheFan5]

Okay, was able to finish up the installation of the pump and wiring. Some pics attached.

I am taking the '12V Switched' from the fuse box D4 which is an unused spot. I read somewhere on this forum that one can take 12V Switched from there. Had to do some cutting etc to the side of the fuse box but it worked out. I was quite happy with my work... Routed the wire inside and above the steering column to bring it to the center console from where I have made a hole and added a plastic fitting to take it out from there. I am going to need 12V switched in many places and am thinking I will put a bus bar somewhere...

I am also thinking of changing the allen-head bolt, that goes on the pressure plate that keeps the pressure and return line pressed in, to a hex head bolt and be done with it once and for all...

Hope this helps someone else doing the project.

[PorscheFan5]

Quick update and a question...

One checking the 12v that I got from D4 at the footwell fuse box, I found that it shows 12V as soon as the battery is connected and remains 12v so far as the battery is connected

That would mean this is 12V Batt and not 12V Switched (12V On only if switch is turned to ON position). Am I missing something?

Need to find 12V SW if possible from fuse box. Or I will have to tap it from behind the radio?

Please help!

[jsceash]

Originally Posted by PorscheFan5

Quick update and a question...

One checking the 12v that I got from D4 at the footwell fuse box, I found that it shows 12V as soon as the battery is connected and remains 12v so far as the battery is connected

That would mean this is 12V Batt and not 12V Switched (12V On only if switch is turned to ON position). Am I missing something?

Need to find 12V SW if possible from fuse box. Or I will have to tap it from behind the radio?

Please help!

The bundle of wire that is right between your circuit breaker and firewall has a red wire with a black stripe I pulled and spliced into that wire to turn on my pump. Not the same brand as your but it starts my pump with the key.



Mine is mounted in the same location different mount.

[PorscheFan5]

Thanks for the prompt response. I see two bunches there, one a thick one another a thin one. Is this RD/BLK wire in the thin one?

BTW, mine is a 2004 Base Boxster. I checked both the bunches that run parallel to the black bar and neither of them have the RD/BLK wire in my case. I will have to find another way.

I would like to find the 12VSw in the cabin somewhere near the driver side dash. That will make it easy for me to route it since I have created a junction point for 12vSw there...

Any ideas?

[PorscheFan5]

I think I found 12v Sw right where I need it!

In the center console area there is a unused 4 pin connector, that I think is for the phone option. This connector has both 12vBatt and 12vSw. The RD/GRN wire is 12vBatt (continuous) and GRN/BLK is 12vSw (Switched). Checked it with the DVM, and confirmed.

Now I can just wire from right there...

[jsceash]

Yes I'm using that feed to Power my oil gauges and sump solenoid switch. My harness looks different may be it's because I have the lithonics headlight. The lamp control module is next to my pump.

[PorscheFan5]

On further observation, I wish I could find a 12V Sw which has a thicker gauge wire on it. This wire seems to be 14awg max... Anyways it will do well for the current purpose...

[PorscheFan5]

I just went with that 12vSw from the phone cable. I am assuming that the current drawn by the PS is not going to be that high.

Having done that, and put the PS fluid in the new lines for the first time, I turned the system on for the first time. The steering is soft like butter but then the car is off the ground and has no wheels mounted...!

The PS pump (from MR2 Spyder) does not make any sound! Don't know if it is running or is defective! Once I gave a few side to side turns the fluid level did go down. This was expected as the lines were new and the fluid was filling up the spaces. I had to pour 10-20ml of fluid more to bring it to correct level. However until I put the front down with the wheels I won't know if the pump is running and everything is ok...!

Any ideas? Also of the people who have used a MR2 or a similar 12V pump, can someone tell me if they can hear the pump work or feel the vibration if you touch it? This is too silent unlike my GAST brake pump which makes a racket...

[Escy]

Nice install. The pump isn't working, they aren't that quiet

[jsceash]

Mine is noticable when running there is a light whine. The sound increases as you turn.

[PorscheFan5]

Is it possible that it is (so) quiet because there is no load (pretty much)? Don't know how to put load on PS while the car is up on jack stands...

What if I was to suck out some of the fluid and then turn the wheel, if I can see the fluid bubbling or churning, or fluid coming back from low pressure end, that would mean pump is working...Similar to what happens when PS fluid is low...